Imaging apparatus

ABSTRACT

In an imaging apparatus, a control unit can operate in one of a first mode which corresponds to an image capturing mode and which controls an image-blur correcting unit, and a second mode corresponding to a playback mode. When the image capturing mode is switched to the playback mode, the control unit operates in the first mode during a predetermined time after switching to the playback mode, and then operates in the second mode after the predetermined time period has elapsed. This makes it possible to immediately obtain an anti-shake effect even if the playback mode is switched to the image capturing mode.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to imaging apparatuses, and in particular,to an imaging apparatus suitable for correcting image blurring caused byshaking of the imaging apparatus.

2. Description of the Related Art

When an image is captured by a camera, camera shake may cause imagedeterioration. To prevent this image deterioration, an image-blurcorrecting device for optically correcting image blurring has beendeveloped.

The image-blur correcting device includes a shake detecting sensorhaving an angular velocity sensor for detecting camera shake, acorrection calculation unit including an integrator for convertinginformation detected by the sensor into a signal representing a drivingposition (target position) of a correcting lens, and a lens driving unitincluding a driving circuit and an actuator for driving the correctinglens.

A vibrating gyro sensor or the like is used as the angular velocitysensor. By integrating an output signal sent as velocity informationfrom the gyro sensor, the output signal can be converted into positionalinformation. By controlling the correcting lens to track the positionrepresented by the positional information, an image-blur correctingoperation is realized.

When a single-chip microcomputer separate from other functions serves asa device for performing operations such as integral calculation andon-and-off management of an image-blur correcting operation (anti-shakeoperation), in many cases that microcomputer consumes a current of 20milliamperes or greater. When a detection circuit and a driving circuitoperate, a current of several tens of milliamperes or greater isconsumed as a circuit consumption current.

In portable products, such as digital cameras, it is common thatbatteries are used, such as lithium-ion batteries or nickel-cadmiumbatteries. When a product uses a power supply having limited power, suchas a battery, consumption of unnecessary power prevents the product frombeing used for a long time.

To solve the above problems, two types of imaging apparatuses of therelated art are known. In one type (e.g., Japanese Patent Laid-Open No.7-294982, corresponding U.S. Pat. No. 5,701,521), after completing animage capturing operation, a microcomputer is switched to a low powerconsumption mode. In the other type (e.g., Japanese Patent Laid-Open No.2001-169176), a controller is changed in response to a playbackoperation.

In the case of stopping an anti-shake operation when switching the imagecapturing mode to a playback mode for displaying the captured imagedata, a certain amount of time is required until the next anti-shakeoperation is performed. This required time includes the time requiredfor a camera-shake-detecting angular sensor to become stabilized, theconvergence time required for arithmetic operations for control, and areset operation time for the correcting lens.

When a desired scene, whose image is to be captured, appears for only ashort time after switching the image capturing mode to the playbackmode, the playback mode must be switched to the image capturing modeagain for image capturing. However, in a case where the anti-shakeoperation is immediately stopped on switching to the playback mode, asin the related art, when the playback mode is switched to the imagecapturing mode just after that, the image-blur correcting device cannotbe immediately operated, so that a certain amount of time is required,as described above. In this case, image capturing with the anti-shakeoperation activated is not possible, thus causing the possibility oflosing a photographing opportunity.

In addition, when image capturing is performed before the above timeelapses, the captured image may have image deterioration since imageblurring occurs due to the fact that image blurring is not corrected.

SUMMARY OF THE INVENTION

The present invention is directed to an imaging apparatus which, afteran image capturing mode is switched to a playback mode and then back tothe image capturing mode, performs immediate image capturing in a statein which an image-blur correcting unit operates.

According to one aspect of the present invention, an imaging apparatuscapable of operating in at least one of an image capturing mode tocapture an image and a playback mode to playback the captured image isprovided. The imaging apparatus includes an image-blur correcting unitfor correcting blurring of the captured image, and a control unit forcontrolling the image-blur correcting unit. The control unit controlsthe image-blur correcting unit to operate in at least one of a firstmode which corresponds to the image capturing mode, and a second modecorresponding to the playback mode. The control unit controls theimage-blur correcting unit so that, responsive to the image apparatusswitching operation from the image capturing mode to the playback mode,the image-blur correcting unit operates in the first mode during apredetermined time after the switching to the playback mode, and thenoperates in the second mode after the predetermined period has elapsed.

The present invention is also directed to a method of controlling animaging apparatus. In another aspect, a method of controlling an imagingapparatus that is operable in an image capturing mode and a playbackmode is provided. The method includes determining whether the imagingapparatus is set to the image capturing mode or the playback mode atactivation of the imaging apparatus. If it is determined that theimaging apparatus is set to the image capturing mode at activation, themethod includes activating an anti-shaking mode of the imaging apparatusand then initiating image capturing. The method also includesdetermining whether the image capturing mode has been switched to theplayback mode. If it is determined that the image capturing mode hasbeen switched to the playback mode, the method includes measuring a timevalue from time of switching to the playback mode. If the time valuemeasured in the measuring step is equal to or greater than apredetermined time, then the method includes deactivating theanti-shaking mode of the imaging apparatus. If the time value measuredin the measuring step is less than the predetermined time, then themethod includes determining whether the playback mode as been switchedto the image capturing mode. If it is determined that the image playbackmode has been switched to the image capturing mode, then the methodincludes initiating image capturing.

Further features and advantages of the present invention will becomeapparent from the following description of exemplary embodiments withreference to the attached drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a block diagram showing a camera according to one embodimentof the present invention.

FIG. 2 is a flowchart illustrating an anti-shake operation of the camerashown in FIG. 1.

FIG. 3 is a flowchart illustrating driving of a lens barrel and animage-blur correcting unit.

DESCRIPTION OF THE EMBODIMENT

An embodiment of the present invention is described below with referenceto the accompanying drawings.

FIG. 1 is a block diagram showing a camera 100 (imaging apparatus)according to one embodiment of the present invention.

The camera 100 has a lens barrel 10 therein. The lens barrel 10 includesa correcting lens 12 (optical element), a zoom lens 14, a focus lens 16,and a shutter 15 having a diaphragm function.

The zoom lens 14 and the focus lens 16 are driven by a motor (not shown)to move in an optical axis direction, whereby the zoom lens 14 changesthe focal length of an imaging optical system and the focus lens 16performs focusing. The correcting lens 12 can move in a plane orthogonalto the optical axis in order to correct image blurring.

An imaging device 20 can be a charge-coupled device or a complementarymetal oxide semiconductor. An optical image formed by the imagingoptical system in the lens barrel 10 is converted into an electricalsignal by the imaging device 20. An analog-to-digital (A/D) converter 28converts an analog output signal from the imaging device 20 into adigital signal.

Under the control of a memory control circuit 30 and a camera systemcontrol circuit 44, a timing generator 22 supplies a clock signal and acontrol signal to the imaging device 20, a digital-to-analog (D/A)converter 24, and the A/D converter 28.

An image display unit 26 can be a TFT (thin film transistor) liquidcrystal display or the like. The image display unit 26 displays capturedimage data and specific information (e.g., image capturing information).Image data for display, or the like, stored in an image display memory32 is output and displayed on the image display unit 26 through the D/Aconverter 24 under the control of the memory control circuit 30. Bysequentially displaying image data generated by an output signal fromthe imaging device 20, an electronic finder function can be realized.

Under the control of the camera system control circuit 44, the memorycontrol circuit 30 performs data input and output control for the timinggenerator 22, the D/A converter 24, the A/D converter 28, the imagedisplay memory 32, and an image processing circuit 34.

The image processing circuit 34 performs predetermined pixelinterpolation and color conversion on an output signal from the A/Dconverter 28 or data from the memory control circuit 30. This generatesimage data.

The camera system control circuit 44 controls driving of a lens barreldriving circuit 36, a shutter driving circuit 38, a focus drivingcircuit 40, and a zoom driving circuit 41 in response to an operation byoperation switches 54 (including a plurality of switches, which aredescribed later).

The lens barrel driving circuit 36 drives the lens barrel 10 in responseto the status of the camera 100. Specifically, when the power to thecamera 100 is off, the lens barrel driving circuit 36 retracts the lensbarrel 10 (retracted state). When the power to the camera 100 is turnedon, the lens barrel driving circuit 36 drives the lens barrel 10 to bein a state (image capturing state) capable of image capturing.

The camera system control circuit 44 calculates exposure values (adiaphragm stop and a shutter speed) based on brightness informationobtained by image processing in the image processing circuit 34. Thecamera system control circuit 44 controls driving of the shutter 15 byusing the shutter driving circuit 38. This performs automatic exposurecontrol.

Based on focusing information on the imaging optical system (detectedcontrast) obtained by image processing in the image processing circuit34, the camera system control circuit 44 uses the focus driving circuit40 to control driving of the focus lens 16. This performs autofocuscontrol, etc.

The camera system control circuit 44 uses the zoom driving circuit 41 tocontrol driving of the zoom lens 14 based on an amount of operation by,among the operation switches 54, the operation switches (a zoom leverand a zoom button) for issuing a zooming instruction and a direction ofthe operation. The camera system control circuit 44 uses a communicationcircuit 56 to convey, to a anti-shake control circuit 62, information ofthe image capturing/playback state of the camera 100, zooming positioninformation, the on/off state of a release switch among the operationswitches 54.

A memory 46 stores still image data and moving image data obtained byimage capturing. The storage capacity of the memory 46 is sufficient tostore data of a predetermined number of still images and data of movingimages for a predetermined time. The memory 46 enables high speedstorage of large amounts of image data even in the cases of continuousimage capturing and panoramic exposure in which data of pluralconsecutive still images is generated. The memory 46 can be used as awork area for the camera system control circuit 44.

A power-supply unit 48 includes a battery detecting circuit, a DC-DCconverter, and a switch circuit for switching a block to be suppliedwith power. The power-supply unit 48 detects installation of a battery,a battery type, remaining battery power, etc. Based on detecting abattery and a command from the camera system control circuit 44, thepower-supply unit 48 controls driving of the DC-DC converter to supplynecessary power (voltage and current) to each portion of the camera 100including a recording medium only in the required period.

An interface (I/F) 50 is used to interface with a recording medium suchas a memory card or a hard disk. A recording circuit 52 is used torecord image data or the like on the recording medium. The recordingcircuit 52 can access the camera system control circuit 44 through theinterface 50.

A mode change-over switch 55 is operated by a photographer in order tochange between the image capturing mode and the playback mode. The modechange-over switch 55 instructs the camera system control circuit 44 toset either mode in response to the state of the mode change-over switch55. In the playback mode, image data recorded on the recording medium isplayed back. Accordingly, the playback mode differs from a mode(so-called “quick review playback”) in which, immediately aftercapturing an image in the image capturing mode, the captured image datais displayed on the image display unit 26.

FIG. 2 is a flowchart illustrating an anti-shake process of the camera100 in this embodiment. The configuration of an image-blur correctingunit 68 is also described in accordance with the flow of the process.

A shake sensor 58 includes a vibration gyro and a gyro driving circuit,and detects an angular velocity in accordance with a shake (such as ahand shake) of the camera 100 (step S201). Shake information detected bythe shake sensor 58 is inputted to the anti-shake control circuit 62through an A/D converter 60. The shake sensor 58 can stop and restart adetecting operation in response to an instruction from the anti-shakecontrol circuit 62.

The anti-shake control circuit 62 is formed by a single-chipmicrocomputer separate from the camera system control circuit 44. Theanti-shake control circuit 62 performs phase compensation or the like ona phase lag occurring in the entire image-blur correcting control systemincluding the shake sensor 58 and a correcting lens driving circuit 66(step S202).

By integrating angular velocity information of the shake detected by theshake sensor 58, the anti-shake control circuit 62 converts the angularvelocity information into positional information (information concerninga target driving position of the correcting lens 12) (step S203). Thepositional information obtained is inputted to the correcting lensdriving circuit 66 through a D/A converter 64.

In addition, the anti-shake control circuit 62 reflects, in adisplacement value of the correcting lens 12, information received fromthe camera system control circuit 44 through the communication circuit56, for example, information concerning a zoom position of the lensbarrel 10 and whether a converter lens is mounted (step S204). In otherwords, based on the information concerning the zoom position, etc., thetarget driving position of the correcting lens 12 is corrected.

The anti-shake control circuit 62 can also stop and restart the gyrodriving circuit of the shake sensor 58 and a lens driving circuit fordriving the correcting lens 12 in response to the imagecapturing/playback state of the camera 100 received from the camerasystem control circuit 44. The power mode of the single-chipmicrocomputer forming the anti-shake control circuit 62 can be switchedbetween a low power consumption mode (mode in which supply of power tothe anti-shake control circuit 62 is suppressed) and a normal mode (modein which supply of power to the anti-shake control circuit 62 ispermitted).

Based on a command from the anti-shake control circuit 62, thecorrecting lens driving circuit 66 drives the correcting lens 12 so asto correct an amount of shift (amount of image blurring) calculated inthe anti-shake control circuit 62. In other words, the correcting lensdriving circuit 66 drives the correcting lens 12 so as to cancel theimage blurring (step S205). This can suppress image deterioration causedby image blurring.

Driving control of the correcting lens 12 by the anti-shake controlcircuit 62 through the correcting lens driving circuit 66 is realizedmainly by feedback control. Specifically, in response to an output froma detecting sensor for detecting the position of the correcting lens 12,the anti-shake control circuit 62 acquires the present position of thecorrecting lens 12, and uses the correcting lens driving circuit 66 todrive the correcting lens 12 so that the deviation between the presentposition and the target position (lens correcting value) of thecorrecting lens 12 is substantially zero.

The detecting sensor for detecting the position of the correcting lens12 can include, for example, a Hall device or the like. The abovefeedback control can be substituted by performing digital control in thesingle-chip microcomputer forming the anti-shake control circuit 62.

The anti-shake operation is performed based on an operation on ananti-shake on/off switch among the operation switches 54. The anti-shakeoperation is continuously performed until a command to stop theanti-shake operation is sent from the camera system control circuit 44to the anti-shake control circuit 62 (step S206).

FIG. 3 is a flowchart illustrating an operation in accordance with theplayback mode and the image capturing mode in this embodiment. Until thecamera 100 is activated, the lens barrel 10 is in a retracted state, andthe anti-shake control circuit 62 is in the low power consumption mode.A gyro driving circuit and the correcting lens driving circuit 66 are ina driving-stopped state.

In step S301, it is determined which of the image capturing mode and theplayback mode is activated when the camera 100 is activated. If theimage capturing mode is activated, the process proceeds to step S304. Ifthe playback mode is activated, the process proceeds to step S302. Thedetermination in step S301 is performed by the camera system controlcircuit 44.

In step S302, a playback operation is initiated in which image datarecorded on a recording medium is read and displayed on the imagedisplay unit 26. At this time, by operating the operation switches 54,the image data recorded on the recording medium can be deleted andedited, the display area can be enlarged and reduced, and an image to beread can be selected.

In step S303, it is determined whether or not the mode of the camera 100has been changed by operating the mode change-over switch 55. In otherwords, it is determined whether the playback mode has been switched tothe image capturing mode. If the mode of the camera 100 has been changedby operating the mode change-over switch 55, the process proceeds tostep S304. If the playback mode remains unchanged, the determination instep S303 is repeatedly performed.

In step S304, the camera 100 is set to the image capturing mode. Thus,the camera system control circuit 44 controls the lens barrel 10 to bein an image capturing state by using the lens barrel driving circuit 36to drive the lens barrel 10.

In step S305, the single-chip microcomputer forming the anti-shakecontrol circuit 62 is switched from the low power consumption mode tothe normal mode to initiate the operation of the anti-shake controlcircuit 62.

In steps S306 and S307, under the control of the anti-shake controlcircuit 62, driving of the gyro driving circuit of the shake sensor 58and driving of the correcting lens driving circuit 66 are initiated.When step S307 is finished, the image-blur correcting unit 68 enters astate capable of performing an anti-shake operation.

In step S308, driving of the imaging device 20 is initiated, and imagedata inputted from the image display storage circuit 32 is displayed inan electric view finder (EVF) formed on the image display unit 26. Thisallows the camera 100 to be in a state capable of image capturing. Whenan anti-shake function is set by operating the anti-shake on/off switchamong the operation switches 54, the anti-shake control circuit 62starts the process shown in FIG. 2 to perform the anti-shake operation.

Conversely, when the anti-shake function is not set, the correcting lens12 is fixed so that the center of the correcting lens 12 is the positionof the optical center of the image capturing optical system. In otherwords, the correcting lens 12 is prevented from moving in a planeorthogonal to the optical axis.

In step S309, it is determined whether or not the camera mode has beenchanged. In other words, it is determined whether or not the imagecapturing mode has been changed to the playback mode. If the mode hasnot been changed (i.e., if the image capturing mode remains unchanged),the determination in step S309 is repeatedly performed. If the mode hasbeen changed to the playback mode, the process proceeds to step S310.

In step S310, the operation of playing back the image data is initiatedand counting by a timer is initiated. The playback operation in stepS310 is similar to that in step S302. In this embodiment, after theplayback operation is initiated, that is, the camera has been changed tothe playback mode, the image capturing state of the lens barrel 10remains unchanged.

In step S311, based on the count value of the above timer, the camerasystem control circuit 44 determines whether or not a predetermined timehas elapsed after initiating the playback operation. The predeterminedtime can be set based on the setting by the manufacturer or can be setbased on the setting by the user via the operation switches 54. Forexample, the predetermined time can be set at five (5) seconds. If thepredetermined time has elapsed, the camera system control circuit 44proceeds to step S313. If the predetermined time has not elapsed, thecamera system control circuit 44 proceeds to step S312.

In steps S313 and S314, under the control of the anti-shake controlcircuit 62, driving of the gyro driving circuit of the shake sensor 58and driving of the correcting lens driving circuit 66 are stopped. Atthe time when step S314 is completed, the image-blur correcting unit 68enters a state of completing the anti-shake operation, that is, a statein which the correcting lens 12 is fixed.

In step S315, the camera system control circuit 44 stops the operationof the anti-shake control circuit 62 by switching the mode of thesingle-chip microcomputer forming the anti-shake control circuit 62 fromthe normal mode to the low power consumption mode. As described above,when the predetermined time has elapsed after setting the playback mode,the image capturing operation is not immediately performed and theoperation of the image-blur correcting unit 68 is not required. Thus, byswitching to the low power consumption mode, the required power can bereduced. This enables the camera 100 to be used for a longer time bysuppressing unnecessary power consumption.

In step S316, by using the lens barrel driving circuit 36 to drive thelens barrel 10, the camera system control circuit 44 retracts the lensbarrel 10, which is in the image capturing state.

In step S312, it is determined whether or not the camera mode has beenchanged. That is, it is determined whether or not the mode has beenchanged to the image capturing mode. If the mode has been changed to theimage capturing mode, the process proceeds to step S308 and the camera100 enters the state capable of image capturing.

When, in a period in which the predetermined time has elapsed, asdescribed above, after switching the camera mode from the imagecapturing mode to the playback mode (step S309), the playback mode isswitched to the image capturing mode, and the process does not proceedto step S313 and thereafter. The operation of the image-blur correctingunit 68 is not stopped and the image capturing state of the lens barrel10 remains unchanged. When this changes the camera mode from theplayback mode to the image capturing mode (steps S312 to S308) duringthe predetermined time, image capturing can be performed in a state inwhich the anti-shake operation is performed, and the anti-shakeoperation in the image-blur correcting unit 68 can produce an image freefrom image blurring.

In this embodiment, the time required for enabling image capturing inthe case of, after switching the camera mode from the image capturingmode to the playback mode, as in the related art, the playback mode isswitched to the image capturing mode, that is, the time (the timerequired for steps S304 to S307) required for changing the state of thelens barrel 10 from the retracted state to the image capturing state andrestarting the operation of the image-blur correcting unit 68, can beomitted. This enables the camera 100 to perform image capturing withoutlosing a photographing opportunity. In addition, image data having lessimage deterioration (less image blurring) can be obtained.

In addition, after the predetermined time elapses after switching thecamera mode to the playback mode, by stopping the anti-shake operation,the required power can be reduced by suppressing unnecessary powerconsumption, compared with a case in which the anti-shake operation isconstantly performed also in a state with the playback mode set.

In this embodiment, in step S313, the driving of the correcting lens 12is stopped. However, the driving range of the correcting lens 12 may belimited (reduced) compared with the case of setting the image capturingmode, and a correcting value (gain) based on the output of the shakesensor 58 may be reduced. Also in this case, power consumption caused bythe driving of the correcting lens 12 can be reduced, thus achievingpower saving.

In this embodiment, a camera using an imaging device has been described.However, the present invention is applicable to a camera using a film.Moreover, in this embodiment, image blurring can be corrected by movingthe correcting lens 12, which is an optical element. However, thepresent invention is applicable to the case of performing image-blurcorrection by moving an imaging device in a plane orthogonal to anoptical axis.

While the present invention has been described with reference toexemplary embodiments, it is to be understood that the invention is notlimited to the disclosed embodiments. On the contrary, the invention isintended to cover various modifications and equivalent arrangementsincluded within the spirit and scope of the appended claims. The scopeof the following claims is to be accorded the broadest interpretation soas to encompass all such modifications and equivalent structures andfunctions.

This application claims priority from Japanese Patent Application No.2004-026921 filed Feb. 3, 2004, which is hereby incorporated byreference herein.

1. An imaging apparatus capable of operating in at least one of an imagecapturing mode to capture an image and a playback mode to playback thecaptured image, comprising: an image-blur correcting unit configured tocorrect blurring of the captured image; and a control unit controllingthe image-blur correcting unit, wherein the control unit controls theimage-blur correcting unit to operate in at least one of a first modecorresponding to the image capturing mode, and a second modecorresponding to the playback mode, and wherein the control unitcontrols the image-blur correcting unit so that, responsive to the imageapparatus switching operation from the image capturing mode to theplayback mode, the image-blur correcting unit operates in the first modeduring a predetermined time after switching to the playback mode, andthen operates in the second mode after the predetermined period haselapsed.
 2. The imaging apparatus according to claim 1, furthercomprising an operating member facilitating switching between the imagecapturing mode and the playback mode.
 3. The imaging apparatus accordingto claim 1, wherein, responsive to the imaging apparatus being set tothe playback mode at activation of the imaging apparatus, the controlunit operates in the second mode, and wherein, responsive to the imagingapparatus switching from the image capturing mode to the playback modeafter activation of the imaging apparatus, the control unit operates inthe first mode during the predetermined time after switching to theplayback mode, and then operates in the second mode after lapse of thepredetermined time.
 4. The imaging apparatus according to claim 1,wherein, responsive to the imaging apparatus switching from the imagecapturing mode to the playback mode, the control unit performs timemeasurement, and the control unit operates in the first mode until avalue obtained by the time measurement is less than the predeterminedtime, and operates in the second mode after the value is equal to orgreater than the predetermined time.
 5. The imaging apparatus accordingto claim 1, wherein, in the second mode, the control unit stops drivingthe image-blur correcting unit.
 6. The imaging apparatus according toclaim 5, wherein the image-blur correcting unit corrects blurring bydriving an optical element of the imaging apparatus, and wherein, in thesecond mode, the control unit controls the image-blur correcting unit tostop driving the optical element.
 7. The imaging apparatus according toclaim 5, wherein the image-blur correcting unit includes a sensoroperable to detect shaking of the imaging apparatus, and wherein, in thesecond mode, the control unit stops operation of the sensor.
 8. Theimaging apparatus according to claim 1, wherein the image-blurcorrecting unit corrects blurring by driving an optical element of theimaging apparatus, and wherein, in the second mode, the image-blurcorrecting unit drives the optical element in a driving range shorterthan that in the first mode.
 9. The imaging apparatus according to claim1, wherein, in the second mode, the image-blur correcting unit has powerconsumption less than that in the first mode.
 10. The imaging apparatusaccording to claim 1, wherein the predetermined time is set based on asetting by a manufacturer or a user.
 11. A method of controlling animaging apparatus operable in an image capturing mode and a playbackmode, the method comprising the following steps: determining whether theimaging apparatus is set to the image capturing mode or the playbackmode at activation of the imaging apparatus; if it is determined thatthe imaging apparatus is set to the image capturing mode at activation,activating an anti-shaking mode of the imaging apparatus and theninitiating image capturing; determining whether the image capturing modehas been switched to the playback mode; if it is determined that theimage capturing mode has been switched to the playback mode, measuring atime value from time of switching to the playback mode; if the timevalue measured in the measuring step is equal to or greater than apredetermined time, deactivating the anti-shaking mode of the imagingapparatus; if the time value measured in the measuring step is less thanthe predetermined time, determining whether the playback mode as beenswitched to the image capturing mode; and if it is determined that theimage playback mode has been switched to the image capturing mode,initiating image capturing.
 12. The method according to claim 11,wherein the step of activating the anti-shaking mode includes: receivinga current position of an optical element of the imaging apparatus;calculating a target position of the optical element; and driving theoptical element from the current position received in the receiving stepto the target position calculated in the calculating step.
 13. Themethod according to claim 12, wherein the step of activating theanti-shaking mode includes setting to a first power mode.
 14. The methodaccording to claim 13, wherein the step of deactivating the anti-shakingmode includes stop driving the lens element.
 15. The method according toclaim 13, wherein the step of deactivating the anti-shaking modeincludes reducing a range of driving the lens element.
 16. The methodaccording to claim 13, wherein the step of deactivating the anti-shakingmode includes setting to a second power mode.
 17. The method accordingto claim 13, further comprising setting the predetermined time based ona setting by a manufacturer or a user.